I am now interested in Broué's abelian defect conjecture and I have read many papers concerning it. For a prime p, I informally define a finite group to be a p-ATI-group if it has abelian Sylow p-subgroups with trivial intersection property. As is well-known, p-ATI-cases are important examples for which there are natural stable equivalences between the module categories of a p-block and its Brauer correspondent. It seems that the conjecture has been verified for simple p-ATI groups. While Andrei Marcus's technique of reduction to simple groups which is based on the structure theorem for finite groups with abelian Sylow p-subgroups by Fong and Harries just deals with principal blocks. I am not sure if there is similar method for nonprincipal p-blocks. The following are my two related questions.
1.Is the conjecture completely solved for principal p-block of p-ATI-groups? 
2.Is there any progress in the direction for nonprincipal p-blocks of p-ATI-groups?